Work-support



T. LUND WORK SUPPORT.

APPLICATION FILED FEB. 4. ma.

1 324:, 9 l 4:. Patented Dec. 16, 1919.

2 SHEETSSHEET l- T. LUND.

WORK SUPPORT.

APPLICATION HLED FEB. 4.1918.

1,324,914; I Patented Dec. 16,1919.

2 SHEETS-SHEET 2.

k I k W l/E/VTU/GZ TED SATES PAT OFFICE.

THOMAS LUND, or BEVERLY, MASSACHUSETTS, AssIeNoa r um'rnnsrion- MACHINERY coaroanrrou, or rarnason, NEW JERSEY, A CORPORATION or NEW JERSEY.

WQBK-SUPPORT.

Specification of Letters Patent.

Patented Dec. 16, 1919.

Application filed February 4, 1918. Serial No. 215,324.

To all whom it may concern:

Be it known that I, THoMAs Lem), a citizen of the United States, res1d1n at Beverly, in the county of Essex and btate tion, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to work, supports and more particularly to a work support or jack for a shoe machine.

For the purpose of disclosing the invention, I have selected a heel attachlng machine as a typical example of a machine in connection with which the invention may advantageously be utilized, but it should be understood that this specific application of the invention is illustrative only and that the improved work support r ack may be used to advantage in various mach nes in which it is desirable that the work be submitted to a measuring operation preliminarily t0 the actual operation of the machine upon it.

In machines for operating upon shoes, or parts of shoes, whereinthe work is subjected to pressure preliminarlly to, or during, the operation of the machine, it 1s frequently necessary or desirable that the pressure applying member or members be 1n1t1ally set in accordance with the thickness of the work to be operated upon. This setting or measuring, as it is commonly called, was formerly effected by manual adjustment, but this required considerable time and the exercise of judgment and skill on the part of the operator. More recently, various mechanisms have been introduced for performing the measuring operation automatically and what is even more important, umformly, so that each piece of work should be measured individually, to the end that subsequent pressure and other operations upon it might be correctly carried out. A 7

nism, while very successful in operation, is somewhat complicated and expensive to construct.

An important object of the present invention is the production of awork support or jack which, among other possible uses, is well adapted for embodiment in a heeling machine, and which, although of simple and Inexpensive construction, iscapable of measuring the work accurately and quickly and of preserving the measurement until the subsequent operations upon the work areperformed. o I

With this object in View, an important feature of the invention consists in the provision of a two-part work support or jack, constructed to permit relative movement between the parts by gravity to measure the work, in combination with means for lockmg. the parts together after such relative movement to preserve the measurement until subsequent operations are performed. In a practical form of the invention the jack may consist of a base member and a shoe supporting member depending from the base member and mounted to slide freely thereon so that when a shoe is jacked and pushed into the machine, the shoe supporting memher may be allowed to drop of its own 7 ing device, preferably automatic in opera-- 7 tion and controlled by the position of the jack, will operate tolock the base member and the shoe supporting member securely together. In this form of the invention, the parts of the jack may remain locke'di-n fixed relation to each other to preserve the measurement until the operation of the machine upon the work is completed, whereupon the jack is swung outwardly and the locking mechanism released to permit the parts of the jack to be reset for the succeeding'op'eration.

A further feature of the invention resides in the combination with a jack, constructed to effect a work measuring operation by gravity, of a look so constructedandconrelated with the jack mechanism that the lock shall be inefiective when the jack is out of operative position and shall become effective when the jack is moved into operative position in the machine,

Other more r l ss'imyortairtfeature f the invention will become apparent from the following description of one embodiment thereof, taken in connection with the accompanying drawings, in which-- Figure 1 is a perspective view of a work support embodying the invention mounted in a well known type of heeling machine; and

Fig. 2 is a central, longitudinal, vertical section of the work support.

Referring now to the drawings, 10 indi cates the frame and 12 the jack base plate of a common type of heeling machine.

Plates 14 are rigidly secured by bolts 16 to lugs 18 depending from the base plate 12. A pivot pin 20 for the jack passes through the plates 14, lugs 18 and base member 22, it being understood that the jack swings in a vertical plane from a forward, inclined position where the shoe is placed upon or removed from it into an operative position in the machine, as illustrated in Fig. 2.

A thumb screw 24, threaded through a lug 26 projecting forwardly from the jack base member 22 bears upon one end of a lever 28, the other end of which is connected to the usual band clamp supporting chain 30. The purpose of the screw 24 is to provide for the ordinary adjustment of the band clamp relatively to the shoe. Upon the lower end of the base member 22 is secured a keeper 32 which acts as a guide for a shoe supporting member 34 which is mounted to slide freely longitudinally of the base member 22. A second keeper 36, secured to the upper end of the shoe supporting member, embraces the depending portion of the base member, acting as a guide for the upper end of the shoe supporting member. The lower end of the work supporting member 34 may carry the usual so-called iron last 38, or may be fitted to engage a wooden last, as desired. By virtue of the slidable mounting of the shoe supporting member, it is adapted to drop under the influence of gravity until the coming together of the parts of the work causes it to encounter sufficient resistance to stop its downward movement. This downward movement constitutes, in effect, the operation of measuring the work.

The rear face of the base member 22 is provided with fine teeth 40 for a considerable portion of its length, and a locking block 42 having corresponding teeth in its face is arranged to engage the base member. The locking block is carried by parallel links 44, 46 pivoted at 48 and 50 respectively in the slidable member 34. The weight of the block 42 is sufficient to cause it, unless restrained, to move downwardly under the influence of gravity about the centers 48, 50 until its teeth are in mesh with the teeth 40. When this condition obtains, the mem ber 34 can descend freely but will be held locked securely against reverse movement relatively to the base member 22. A lug 52, projecting from the rear of the block 42, is perforated to permit a screw threaded rod 54 to pass loosely through it. The rod 54 is secured to a cross bar 56, supported by a pair of chains 60, the upper ends of which are secured to the plates 14. The rear ends of the plates 14 are arcuate in shape, and the chains 60 are flexible to conform to them when the jack is swung forwardly. A nut 62 is adjustably threaded upon the rod 54 beneath the lug 52, and its proper position is such that when the parts are in operative position, as shown in Fig. 2, the nut will not engage the lug. Nhen, however, the jack is swung forwardly out of operative position, it moves about the center 20, whereas the rod 54 and nut 62 swing about a shifting center at the rear ofthe pivot 20 and, early in the outward movement of the jack, the lug 52 brings up against the top of the nut. Further outward movement of the jack will cause the locking block 42 to be swung upon the links 44, 46 out of locking engagement with the teeth 40. A stop 64, integral with and pro,- jecting upwardly from, the link 46 has a flat front face 66 arran ed to en a e an adjustable screw 68 as the link is swung upwardly about its pivot 50. The adjustment of the screw 68 is normally such that the links 44, 46 and the block 42 supported thereby are permitted to swing upwardly until the locking teeth upon the block are just out of engagement with those upon the base member 22. At this point the face 66 of the lug 64 encounters the point of the screw 68, preventing further swinging of the links and causing the shoe supporting member 38 to slide upwardly upon the base member during the continued outward swinging movement of-the jack.

A latch 70 is pivoted to one of the plates 14 and is under the influence of a spring 72 tending to move it rearwardly. A pin 74, mounted in the upper end of the shoe supporting member 34, is so located that it will engage the latch 70 during the early part of the forward movement of the jack. The spring 72 permits the latch to yield forwardly as this movement is continued.

The usual nailing die or pressure applying member of the heeling machine is inclicated at 76, and in this type of machine there is mechanism for moving it upwardly to apply pressure to the work while the jack is held stationary.

The operation of the mechanism above described is as follows: Assuming the jack to be swung forwardly to shoe receiving position, the sliding shoe support 34 will be raised relatively to the base member 22. The shoe is jacked in this position and, a

heel having been located upon the die 76, the work support is swung inwardly to move the shoe into register with the heel. As the jack is swung inwardly the work support and shoe are held up by the latch 70 sufficiently long to permit the shoe to be swung in over the heel without displacing thelatter. At or near the limit of the inward movement, the pin 74: drops ofi the latch 7 0 and the shoe supporting member 34 then falls freely of its own weight until the parts of the work are brought together. At this time the lug 52 is above the nut 62 and the looking block 42 drops, under the influence of gravity, into locking engagement with the teeth 40. This doesnot prevent the downward measuring movement of the shoe support but when the work has been measured and the shoe seated upon the heel, the engagement of the teeth of the locking block with the teeth on the base member 22- looks the base member and the shoe supporting member securely together, positively preventing upward movement of the shoe supporting member. The jack then becomes in effect a rigid, unyielding structure for resisting the upward thrust of the pressure applying member 76.

After the operation of the machine upon the work has been performed, the shoe with the attached heel is swung forwardly, the lug 52 comes to a bearing upon the nut 62, with the result that the locking block is disengaged, and the member 34 lifted into its initial position ready for the removal of the shoe and substitution of another.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. A work support or jack comprising a movable base member and a shoe supporting member, said members being relatively movable by gravity, and means for locking said members together after such relative movement.

2. A work support or jack comprising a base member, a shoe supporting member clepending from said base member and movable relatively thereto by gravity, and means for locking said members together in any position which the shoe supporting member may assume by such relative movement.

3. A work support or jack comprising a base member and a shoe supporting member, said members being relatively movable by gravity, and automatic means for locking said members together in any relation which they may assume by such relative movement.

4. A movable work support or jack comprising relatively movable base and shoe sup porting members, and means operated by gravity for locking said members together against relative movement and operated by movement of the jack for unlocking said members.

5. A movable work support or jack comprising base and shoe supporting members relatively movable under the influence of gravity, and means controlled by the position of the jack for locking said members against relative movement and operated by movement of the jack for unlocking said members. 7

6. In a work support or jack, the combination of a base member mounted for swinging movement into and out of operative pos1t1on, a shoe supportingmember moimted for slidingmovement upon said base member under the influence ofgravity, and automatic means for locking said members rigidly together when the jack is swung into operative position.

7. In a work support or jack, the combination of a movable base member, a shoe supporting member depending from said base and mounted to slide downwardly thereon by gravity, a one-way lock constructed and arranged to permit the shoe supporting member todescend until it encounters sufficient resistance to stop its movement and then to prevent it from moving in the opposite direction and means operated by movement of the jack for disengaging said lock.

8. In a work support or jack, the combination of a base member mounted for swinging movement into and out of operative po sition, a shoe supporting member carried by the base and longitudinally movable thereon mechanism for locking said members against relative movement in one direction, and controlling means constructed, and arranged to prevent operation of the locking mechanism when the jack is out of operative position, and to permit operation of the locking mechanism when the jack is swung into operative position.

In testimony whereof I have signed my name to this specification.

THOMAS LUND. 

